29 U. S. BUREAU OF FISHERIES 
ers. The weir on the Wenatchee River was located at the Tumwater 
Dam of the Puget Sound Power & Light Co. and was operated 
from June 16 to September 26, inclusive. During that time, which in- 
cluded the entire duration of the blueback run in the Wenatchee 
River, 29 blueback salmon, 5 chinook salmon, and 1 steelhead trout 
were counted. The weir in the Okanogan River was placed at Oro- 
ville, Wash., and counts were made from July 9 to October 2. This 
counting also covered the entire blueback run in that tributary and 
resulted in the recording of 905 blueback salmon and 4 chinook sal- 
mon at the weir. Because of the unusually small size of the Okano- 
gan bluebacks during 1936 and the fact that some of the pickets in 
the weir were spaced slightly too far apart, some of these fish pene- 
trated the weir and were not counted for a few days’ time. 'There- 
fore, the actual number of fish passing the weir might have been 
somewhat more than the total given. These counts not only provide 
data on the number of bluebacks spawning in the two river systems 
where the weirs were operated, but also furnish a means of comput- 
ing the number of bluebacks which normally pass the site of the 
Grand Coulee Dam. Since there are no other known spawning 
erounds for bluebacks between Rock Island and Grand Coulee it fol- 
lows that the difference between the sum of the Wenatchee and Oka- 
nogan River bluebacks and the Rock Island bluebacks represents the 
number which go past Grand Coulee, and which must therefore be 
provided for in any plan for fish protection in connection with that 
structure. 
Stream survey activities for the season were principally confined 
within the boundaries of the State of Washington. A total of 743 
miles of streams were surveyed during the year. Examinations of the 
tributary streams of the Columbia in southwestern Washington were 
undertaken during the fall months. Satisfactory progress was made 
in the survey in this section. The streams on which surveys have 
been completed in this area are: Coal Creek, Abernathy Creek, Mill 
Creek, Skamokawa Creek, Salmon Creek, Lewis River, Tilton River, 
and Ostrander Creek. Other creeks in southwestern Washington on 
which additional work must be done to complete the surveys are: 
Grays River, Alochoman Creek and Kalama River emptying into the 
main Columbia, and tributaries of the Cowlitz such as Cowieman 
Creek, Toutle River, and the Cispus River. In the south central area 
of the State surveys have been completed of Wind River, Rock Creek, 
and Little White Salmon River. Most of the streams in central 
Washington had been surveyed previously. The work during the 
year consisted of surveys of the tributaries of the Yakima River 
system. The completed surveys are as follows: Teanaway River, 
Swauk Creek, Taneum Creek, Manastash Creek, Umptanum Creek, 
and Ahtanum Creek, all of which are tributaries of the main Yakima, 
and the Little Naches River, Rattlesnake and Cowiche Creeks, tribu- 
taries of the Naches River. There remain only 26 miles of survey 
work for the completion of the main Yakima River. In north central 
Washington the examination of the Wenatchee River, Entiat River, 
and Okanogan River systems was finished. The stream surveys in 
southeastern Washington were completed when Asotin Creek and the 
Walla Walla River were examined to their headwaters. 
